Medical Image and Signal Processing Research CenterJournal of Medical Signals and Sensors8120180107Designing an Inverter‑based Operational Transconductance Amplifer‑capacitor Filter with Low Power Consumption for Biomedical Applications5359ENSajadYousefinezhadSaeedKermaniAssociate Professor, Department of Biomedical Engineering Faculty of Advance Medical Technology, Isfahan University of Medical Sciences, Isfahan, Iran. Email: kermani@med.mui.ac.ir Tel: 09133107346. kermani@med.mui.ac.irSaeedHosseinnia20180106The operational transconductance amplifer‑capacitor (OTA‑C) flter is one of the best structures forimplementing continuous‑time flters. It is particularly important to design a universal OTA‑C fltercapable of generating the desired flter response via a single structure, thus reducing the flter circuitpower consumption as well as noise and the occupied space on the electronic chip. In this study,an inverter‑based universal OTA‑C flter with very low power consumption and acceptable noisewas designed with applications in bioelectric and biomedical equipment for recording biomedicalsignals. The very low power consumption of the proposed flter was achieved through introducingbias in subthreshold MOSFET transistors. The proposed flter is also capable of simultaneouslyreceiving favorable low‑, band‑, and high‑pass flter responses. The performance of the proposedflter was simulated and analyzed via HSPICE software (level 49) and 180 nm complementarymetal‑oxide‑semiconductor technology. The rate of power consumption and noise obtained fromsimulations are 7.1 nW and 10.18 nA, respectively, so this flter has reduced noise as well as powerconsumption. The proposed universal OTA‑C flter was designed based on the minimum number oftransconductance blocks and an inverter circuit by three transconductance blocks (OTA).http://www.jmss.mui.ac.ir/index.php/jmss/article/view/410http://www.jmss.mui.ac.ir/index.php/jmss/article/download/410/596